code: def testCopyStatistic(self):
      p = Pool(
          {
              "foo": [3, 6, 3, 2, 39],
              "bar.ff.wfew.f.gr.g.re.gr.e.gregreg.re.gr.eg.re": [
                  [324, 5, 54],
                  [543, 234, 57],
              ],
          }
      )
  
      results = PoolAggregator(defaultStats=["copy"])(p)
  
      self.assertAlmostEqualVector(results["foo"], p["foo"])
      self.assertAlmostEqualMatrix(
          results["bar.ff.wfew.f.gr.g.re.gr.e.gregreg.re.gr.eg.re"],
          p["bar.ff.wfew.f.gr.g.re.gr.e.gregreg.re.gr.eg.re"],
      )
      self.assertEqualVector(
          results.descriptorNames(),
          ["foo", "bar.ff.wfew.f.gr.g.re.gr.e.gregreg.re.gr.eg.re"],
      )
  
file_path: essentia/test/src/unittests/stats/test_poolaggregator.py
imports: from essentia_test import *
label_desc: Use image node_id 10 for calling the TestPoolAggregator obj's underlying member method code with example usage: obj.testCopyStatistic() without return types